frostfs-node/pkg/local_object_storage/localstore/meta.go

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package localstore
import (
"context"
"github.com/nspcc-dev/neofs-api-go/hash"
"github.com/nspcc-dev/neofs-api-go/refs"
"github.com/pkg/errors"
)
// StoreEpochValue is a context key of object storing epoch number.
const StoreEpochValue = "store epoch"
func (l *localstore) Meta(key refs.Address) (*ObjectMeta, error) {
var (
err error
meta ObjectMeta
k, v []byte
)
k, err = key.Hash()
if err != nil {
return nil, errors.Wrap(err, "Localstore Meta failed on key.Marshal")
}
v, err = l.metaBucket.Get(k)
if err != nil {
return nil, errors.Wrap(err, "Localstore Meta failed on metaBucket.Get")
}
if err := meta.Unmarshal(v); err != nil {
return nil, errors.Wrap(err, "Localstore Metafailed on ObjectMeta.Unmarshal")
}
return &meta, nil
}
func metaFromObject(ctx context.Context, obj *Object) *ObjectMeta {
meta := new(ObjectMeta)
o := *obj
meta.Object = &o
meta.Object.Payload = nil
meta.PayloadSize = uint64(len(obj.Payload))
meta.PayloadHash = hash.Sum(obj.Payload)
storeEpoch, ok := ctx.Value(StoreEpochValue).(uint64)
if ok {
meta.StoreEpoch = storeEpoch
}
return meta
}